• 제목/요약/키워드: NOESY

검색결과 66건 처리시간 0.025초

Four New Darnmarane-Glycosidesl Ginsenosides $Rg_5, Rh_4, Rs_3, AND Ff_2$, from Korean Red Ginsengs the Root off]unarm ginseng C. A. Meyer

  • Jong Dae Park;Nam
    • 고려인삼학회:학술대회논문집
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    • 고려인삼학회 1998년도 Advances in Ginseng Research - Proceedings of the 7th International Symposium on Ginseng -
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    • pp.115-126
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    • 1998
  • Four new dammarnae-glycosides named ginsenosides Rgs, Rh4, RsB and Rf2 have been isolated 1'rom Korean red ginseng, the root of Panax ginseng C. A. Meyer (Araliaceae) and their chemical structures have been elucidated by chemical and spectroscopic methods, including'H-'H COSY, HMQC, HMBC, NOESY, as 3-0- [$\beta$-D-glucopyranosyl(1 ~2)-$\beta$-D-glucopyranosyl] dammar-20(22) , B4-diene-3P,12P-diol (ginsenoside Rgs),6-0-$\beta$-D-glucopyranosyl-dammar-20(22),24-diene-3P,6P, 12P-triol (ginsenoside Rh4),3-0- [6" -0-acetyl-D-glucopyranosyl(1 ~2)--D-glucopyranosyl] 20(5)- protopanaxadiol (ginsenoside Rs3) and 6-0- [u-L-rhamno-pyranosyl(1 ~2)-$\beta$-D-glucopyranosyl] dammarane -3$\beta$, 6a, 12 $\beta$, 20(R),25-pentol(ginsenoslde Rfa). The absolute stereo structure of a double bond at C-20(22) was determined as entgegen type by applying NOESY.OESY.

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쇠비름에서 분리된 2개의 Biophenolic Glycosides (Two Biophenolic Glycosides from Portulaca oleracea)

  • 서영완;신종헌;이범종;이동석
    • 대한화학회지
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    • 제47권1호
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    • pp.43-46
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    • 2003
  • 우리나라에 널리 분포하며 오래 동안 약용으로 사용되어 온 쇠비름으로부터 페놀 글리코시드인 3-hydroxy-1(2-hydroxyethyl)phenyl-4-O-${\beta}$-D-glucopyranoside(1)과 2-(3,4-dihydroxyphenyl)ethyl-O-${\beta}$-D-glucopyranoside (2)를 칼럼 크로마토그래피 및 역상 HPLC로 분리하였으며, NOESY, HMQC, HMBC와 같은 이차원적인 NMR 분광실험에 의해서 이 물질들의 $^{13}C$ NMR 분광 데이터 값의 지정이 수정되었다. DPPH를 이용하여 이 물질들의 항산화 활성을 측정한 결과 주목할 만한 활성을 나타내었다.

Flavanone Glycoside from the Fruits of Chaenomeles sinensis

  • Kim, Ho-Kyoung;Jeon, Won-Kyung;Ko, Byoung-Seob
    • Natural Product Sciences
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    • 제6권2호
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    • pp.79-81
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    • 2000
  • Investigation of the fruits of Chaenomeles sinensis (Rosaceae) resulted in the isolation of a minor flavonoid. The structure of flavanone glycoside was determined to be as $2-hydroxynaringenin-7-O-{\beta}-glucoside$ on the basis of FAB-MS and spectral evidence, especially by 2D-NMR $(^1H-^1H\;COSY,\;HMQC,\;HMBC\;and\;NOESY)$.

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Griseusin C, a Novel Quinone Derivative from a Marine-Derived Fungus Penicillium sp.

  • Li, Xiang;Zheng, Yinan;Sattler, Isabel;Lin, Wenhan
    • Archives of Pharmacal Research
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    • 제29권11호
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    • pp.942-945
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    • 2006
  • A novel quinone derivative, Griseusin C (1), along with a known quinone, Naphthoquinone C (2), was isolated from the lyophilized culture broth of the marine-derived fungus Penicillium sp. The structures were elucidated on the basis of extensive 1D-and 2D-NMR, as well as HRESIMS, spectroscopic analysis. The relative stereochemistries of the compounds were assessed by NOESY analysis.

12-Hydroxyamoorastatone, a New Limonoid from Melia azedarach var. Japonica

  • Jong-Woong Ahn;Geon-Seek Yoo;Zaesung No;Seung-Ho Lee
    • Bulletin of the Korean Chemical Society
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    • 제14권5호
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    • pp.554-556
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    • 1993
  • A chemical investigation of the stem bark of Melia azedarach var. Japonica (Meliaceae) has led to a new limonoid, 12-hydroxyamoorastatone (1), whose structure has been elucidated by spectroscopic measurements including 2D-NMR. The 2D-NOESY experiment on its di-p-bromobenzoate derivative (1a) has established the relative configuration of 1.

갈조류 지충으로부터 분리한 3개의 Norisoprenoids 화합물 (Three Norisoprenoids from the Brown Alga Sargassum thunbergii)

  • 박기의;김유아;정현아;이희정;안종웅;이범종;서영완
    • 대한화학회지
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    • 제48권4호
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    • pp.394-398
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    • 2004
  • 우리나라 연안에 널리 분포하고 있는 지충이로부터 3개의 norisoprenoid 화합물들인 (+)-epiloliolide (1), (-)-loliolide (2), apo-9''-fucoxanthinone (3)을 칼럼크로마토그래피와 역상 HPLC를 사용하여 분리$\cdot$정제하였다. 이들 분리한 화합물 1, 2 및 3은 갈조류인 지충이로부터 처음 분리되어 보고하는 것이다. 특히 화합물 1은 비록 육상식물에서 분리된 바 있으나, 해양생물로부터는 처음 분리되어 보고하는 것이다. 분리된 화합물의 구조는 $1^H$ COSY, NOESY, HMQC 그리고 HMBC와 같은 이차원적인 NMR 분광학적인 실험을 이용하여 문헌치와 비교하여 확인하였다.

Two New Sesquiterpenes from Pluchea arguta

  • Ahmad, Viqar Uddin;Zahid, Muhammad;Khatoon, Rasheeda;Ali, Zulfiqar;Abbas, Muhammad;Iqbal, Muhammad Zafar
    • Natural Product Sciences
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    • 제5권2호
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    • pp.85-87
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    • 1999
  • Two new sesquiterpenes, 3'-chloro-2'-hydroxy-3-epi-arguticinin (1) and argutenol (2) belonging to eudesmane and gorgonane classes respectively, have been isolated from Pluchea arguta. Their structures were elucidated with the help of sophisticated spectroscopic techniques including nOe difference and NOESY experiments.

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Isolation of Magnolialide and Artesin from Cichorium intybus: Revised Structures of Sesquiterpene Lactones

  • Park, Hee-Juhn;Kwon, Sang-Hyuk;Yoo, Ki-Oug;Jung, Won-Tae;Lee, Kyung-Tae;Kim, Joo-Il;Han, Yong-Nam
    • Natural Product Sciences
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    • 제6권2호
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    • pp.86-90
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    • 2000
  • Two known eudesmanolides, magnolialide and artesin, were isolated from the roots of Cichorium intybus. Their structures were confirmed by HMBC and NOESY NMR spectral interpretation. Therefore, guaianolides and eudesmanolides that have been previously reported should be revised.

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Structural Elucidation of Epicatechin $(4{\rightarrow}7)$ 5,8,3'4'-tetrahydroxy-(2R,3R)-flavan-3-ol Isolated from the Bark of Korean Pine Tree (Pinus densifora)

  • Lim, Yoong-Ho;Yong, Yeun-Joong;Oh, Sung-Jin;Song, Hong-Keun
    • Applied Biological Chemistry
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    • 제41권4호
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    • pp.265-269
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    • 1998
  • Several flavonoid dimers were isolated and elucidated from the bark of Korean pine tree (Pinus densiflora). One of them was postulated to be a compound, epicatechin $(4{\rightarrow}7)$ 5,8,3',4'-tetrahydroxy-(2R,3R)-flavan-3-ol, whose structural determination was carried out by diverse NMR techniques.

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